Harper should do well at Mizzou. The fans will embrace her. She's a players' coach and that's what they're used to. High School recruiting in Missouri is tough, even with the proximity to KC and St. Louis. The Cunningham sisters were an outlier.
If there's some NIL money the portal should actually be easier. A player on another team who doesn't feel they have an opportunity to shine and/or get enough playing time could be a star at Mizzou.
The expectations of Mizzou WBB fans are remarkably different than those of the Lady Vols. There will be a lot less pressure. An upset here or there (and if you check the record Pingeton delivered a bunch of those) and making the Tourney once in awhile will please them.
Several posts here questioned whether Mizzou could ever be more than a “middle-of-the-pack” team in the SEC, and that's probably true. But isn't that how the Lady Vols could be described after a ninth-place finish this year? Mizzou lost to the LV's by 5, Texas by 9, Ole Miss by 2, and Georgia by 2. But their lack of ANY bench strength caused some late-game collapses that provided lopsided final scores in some games. But it's not accurate to say that they can't compete in the SEC. (And didn't they used to say that about Vandy?)
It may take a few years, but at Mizzou, Harper will get them.